Method and apparatus for accelerated link setup

Abstract

A methods and apparatus may be used for accelerated link setup. A method may include a station (STA) acquiring information about an access point of an Institute of Electrical and Electronics Engineers (IEEE) 802.11 network in advance through a previously connected IEEE 802.11 interface and/or an interface other than the IEEE 802.11 network. The STA may use the acquired information during a link setup procedure between the STA and the access point. The information may include a suggestion for a specific procedure to complete the link setup procedure between the STA and the access point.

What is claimed is: 
     
       1. A method for use in an access point (AP), the method comprising:
 receiving a probe request frame that includes a system configuration identifier; 
 determining whether the received system configuration identifier matches a stored system configuration identifier; 
 on a condition that the received system configuration identifier matches a stored system configuration identifier, transmitting a reduced probe response frame in response to the probe request frame; and 
 on a condition that the received system configuration identifier does not match any stored system configuration identifier, transmitting a full probe response frame in response to the probe request frame. 
 
     
     
       2. The method of  claim 1 , wherein the received system configuration identifier is a configuration change count (CCC) value. 
     
     
       3. The method of  claim 1 , further comprising:
 incrementing a stored system configuration identifier each time a configuration change is detected. 
 
     
     
       4. The method of  claim 1 , wherein the probe request frame includes an address of the AP. 
     
     
       5. An access point (AP) comprising:
 a receiver configured to receive a probe request frame that includes a system configuration identifier; 
 a processor configured to determine whether the received system configuration identifier matches a stored system configuration identifier; 
 a transmitter configured, on a condition that the received system configuration identifier matches a stored system configuration identifier, to transmit a reduced probe response frame in response to the probe request frame; and 
 the transmitter is further configured, on a condition that the received system configuration identifier does not match any stored system configuration identifier, to transmit a full probe response frame in response to the probe request frame. 
 
     
     
       6. The AP of  claim 5 , wherein the received system configuration identifier is a configuration change count (CCC) value. 
     
     
       7. The AP of  claim 5 , further comprising:
 incrementing a stored system configuration identifier each time a configuration change is detected. 
 
     
     
       8. The AP of  claim 5 , wherein the probe request frame includes an address of the AP. 
     
     
       9. A method for use in a non-access point (non-AP) station (STA), the method comprising:
 transmitting, to an access point (AP), a probe request frame that includes a system configuration identifier; 
 receiving, on a condition that the transmitted system configuration identifier matches a system configuration identifier stored in the AP, a reduced probe response frame in response to the probe request frame; and 
 receiving, on a condition that the transmitted system configuration identifier does not match au system configuration identifier stored in the AP, a full probe response frame in response to the probe request frame. 
 
     
     
       10. The method of  claim 9 , wherein the transmitted system configuration identifier is a configuration change count (CCC) value. 
     
     
       11. A non-access point (non-AP) station (STA), comprising:
 a transmitter configured to transmit, to an access point (AP), a probe request frame that includes a system configuration identifier; 
 a receiver configured to receive, on a condition that the transmitted system configuration identifier matches a system configuration identifier stored by the AP, a reduced probe response frame in response to the probe request frame; and 
 the receiver further configured to receive, on a condition that the system configuration identifier does not match au system configuration identifier stored by the AP, a full probe response frame in response to the probe request frame. 
 
     
     
       12. The non-AP STA of  claim 11 , wherein the transmitted system configuration identifier is a configuration change count (CCC) value. 
     
     
       13. A method for use in a non-access point (non-AP) station (STA), the method comprising:
 receiving, from an access point (AP), a system configuration identifier comprising a configuration change count (CCC) value, wherein the CCC value is an integer value that represents a configuration instance; 
 determining, by the non-AP STA, whether there is a configuration instance entry in a database associated with the AP; 
 on a condition that there is no configuration instance entry in the database associated with the AP, creating a new configuration instance entry associated with the AP and the received CCC value; 
 on a condition that there is a configuration instance entry associated with the AP in the database, determining whether the received CCC value matches a CCC value stored in the configuration instance entry associated with the AP; and 
 on a condition that the received CCC value does not match any CCC value stored in the configuration instance entry associated with the AP, updating the configuration instance entry associated with the AP based on the received CCC value. 
 
     
     
       14. The method according to  claim 13 , wherein the database is managed by a medium access control (MAC) layer management entity (MLME), a station management entity (SME), or a connection manager module. 
     
     
       15. The method according to  claim 13 , wherein the database comprises a plurality of configuration instance entries each associated with a respective AP, wherein at least one configuration instance entry of the plurality of configuration instance entries comprises a CCC value that corresponds to a prior system configuration of the respective AP. 
     
     
       16. The method according to  claim 15 , wherein at least one configuration instance entry of the plurality of configuration instance entries corresponds to an identifier of a changed system element. 
     
     
       17. A non-access point (non-AP) station (STA) comprising:
 a receiver configured to receive, from an access point (AP), a system configuration identifier comprising a configuration change count (CCC) value, wherein the CCC value is an integer value that represents a configuration instance; 
 a processor configured to determine, by the non-AP STA, whether there is a configuration instance entry in a database associated with the AP; 
 the processor, on a condition that there is no configuration instance entry in the database, further configured to store a new configuration instance entry in the database based on the received CCC value; and 
 the processor is further configured to determine whether the received CCC value matches a CCC value stored in the database, and on a condition that the received CCC value does not match any CCC value stored in the database, update the database based on the received CCC value. 
 
     
     
       18. The non-AP STA of  claim 17 , wherein the database is managed by a media access control (MAC) layer management entity (MLME), a station management entity (SME), or a connection manager module. 
     
     
       19. The non-AP STA of  claim 17 , wherein the database comprises a plurality of configuration instance entries each associated with a respective AP, wherein at least one configuration instance entry, of the plurality of configuration instance entries, comprises a CCC value that corresponds to a prior system configuration of the respective AP. 
     
     
       20. The non-AP STA of  claim 19 , wherein at least one configuration instance entry, of the plurality of configuration instance entries, corresponds to at least one identifier of a changed system element.